Starter quiz
- What is the functional group of alkenes?
- -OH
- C=C ✓
- COOH
- -COO-
-
Name the molecule shown in the image.- 'ethene' ✓
- What is the relative molecular mass of H₂O?
- '18' ✓
- What is the relative molecular mass of propene (C₃H₆)?
- 1
- 12
- 18
- 36
- 42 ✓
-
- Monomers such as styrene can join together to form a polymer. What will the polymer be called?
- poly(ethene)
- poly(styrene) ✓
- poly(tetrafuoroethene)
- poly(vinylchloride)
-
- Which monomer is used to make poly(propene)?
- ethene
- ethane
- propene ✓
- propanol
- propane
-
Exit quiz
- How many products are formed during addition polymerisation?
- 1 ✓
- 2
- 3
- 4
-
Polymerisation of the monomer shown in the image will produce which polymer?- poly(propene)
- poly(bromoethene)
- poly(chloroethene) ✓
- poly(tetrafluoroethene)
-
What is shown in the image?- a monomer ✓
- a polymer
- a repeating unit
-
- Match the key terms with the correct definitions.
- polymers⇔long-chained molecules formed by joining together monomers. ✓
- monomers⇔small molecules that can join together to form a polymer. ✓
- addition polymerisation⇔where monomers join together to form only one product. ✓
- repeating unit⇔a section of a polymer that repeats. ✓
- How does the relative molecular mass (Mr) of poly(ethene) compare with the relative molecular mass of ethene?
- The Mr of poly(ethene) is larger than the Mr of ethene. ✓
- The Mr of poly(ethene) is the same as the Mr of ethene.
- The Mr of poly(ethene) is smaller than the Mr of ethene.
-
The image shows two repeat units. Which monomer was used in polymerisation to form a polymer containining these repeat units?- ethene ✓
- propene
- butene
- pentene
-
Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- A polymer is a substance of high average relative molecular mass made up of small repeating units.
- In addition polymerisation only one molecule is formed, e.g. addition polymerisation of ethene forms poly(ethene).
- Polymers have a specific displayed formula to show repeat units.
- A polymer's monomer can be deduced from its structure and vice versa.
- Addition polymers can be made by combining together a variety of monomer molecules containing C=C.
Common misconception
Not including the bonds at the end of a repeating unit.
The slide deck states the need for open bonds to show how repeating units are bonded to each other.
Keywords
Polymers - Polymers are long-chained molecules formed by joining together monomers.
Monomers - Monomers are small molecules that can join together to form a polymer.
Relative molecular mass - The relative molecular mass of a substance is the sum of the relative atomic masses of all the atoms in a molecule.
Addition polymerisation - Addition polymerisation is a type of polymerisation where monomers join together to form only one product; a polymer.
Repeating unit - The section of a polymer that repeats is known as the repeating unit.
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